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SIM cards

Created by tmo_nicole on Jul 14, 2011 10:57 AM. Last modified by tmo_joshua on Apr 16, 2015 8:56 AM.

Version 25

The SIM card is the brain of your digital phone and gives you access to our advanced nationwide 4G network. The SIM card number is linked to your personal phone number, so you can call, text, browse the web, and more from just about anywhere. You can easily transfer it into other phones, retaining your personalized service information.

Retail T-Mobile phones comes with a SIM card in the box. If you need to replace your SIM card, you can buy a SIM starter kit.

If you need help inserting a SIM card into your phone, you'll find guides and steps on the Phones and Devices page.

SIM card types

Different phones use different kinds of SIM cards. To find out what kind of SIM card your phone is designed for, view the Tech Specs for your phone. Find them by clicking your phone on the Phones and Devices page.

SIM security features

You can lock your SIM card to help prevent someone from using your phone by securing it with a PIN number. If you forget your PIN, the PUK code on the back of your SIM jacket can be used to unlock it as well, or you can contact us for help.

Switch your SIM to a new phone

Switching phones is now a lot easier, thanks to your SIM card. You can quickly and easily switch out your SIM card to another phone that uses the same type of SIM, without having to worry about losing the benefits of the T-Mobile network.